let a = {s:111,z:234,e:[1,2,3]}

Object.defineProperty(a, 'e', {
    writable: true,
    configurable: true,
    enumerable: false
})

let c = Object.create(a);
console.log(Object.getOwnPropertyDescriptors(c));

let d = Object.assign({}, a)
console.log(Object.getOwnPropertyDescriptors(d));
